Bucket-filing machine.



J. REDBELL.

BUCKET ILNG MACHINE.

APPLIGMION FILED Nov. 3,1904.

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M my A John Hidceil.

l REDBELL.

'BUGKBT mma MACHINE. APPLICATION FILED NOV.3,1901!. gl D Pa-ented June l5, 1969.

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BUCKET FILING MACHINE,

A'PJLIoATIoN Hmm Nov.s,19o4.

Patented June 15, 1909.

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inventor Jhn Riddel I.

Wfne se www( LT. REDBELL.

BUCKET FILING- MAHINE. I

APPLIOATION FILED Nov. 3,1904.

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JOHN RIDDELL, OF SCHENECTADY, NEW YORK, ASSIGNOR TO GENERAL ELECTRIC COM- PANY, A CORPORATION OF NEW YORK.

BUCKET-FILING MACHINE.

Specification of Letters Patent.

Application filed November 3, 1904.

Patented .Tune 15, 1909.

Serial No. 231,199.

To all whom it may concern:

Be it known that l, JonN RIDDELL, a citizen of the United States,fyiesiding at Schenectady, in the county of Schenectady and State of New York, have invented certain new and useful Improvements .in liuckct Filing Machines, of which the following is a specification.

My invention relates to filing machines,.

machines intended for other purposes Wherein surfaces other than plane are to be iinished.

l Turbine buckets as now constructed have to conform to certain shapes, which shapes are governed by de'linite laws that need not be here specified. It is sullicient to say that upon the accuracy of these bucket shapes depends in a large degree the eiiiciency of the turbine. To state the matter in a general Way, each turbine bucket is crescent-shaped, that is to say, it is thick in the middle and tapers toward the sides where the walls terminate in a sharp edge. The front Wall of the bucket is convex while the rear wall is concave, the latter being the surface upon Whilthe steam impinges, hence it must be accurately formed andgiven a smooth finish.

I These buckets are either' cut from thesolid stock by a bucket-cutting machine el suitable construction or are cast or otherwise formed. ln either case it may be necessary to -finish them 'with a lile before they can be used'to the best advantage. Attempts have i been I natle to finish cast buckets by taking oli ahght chip in a bucket-cutting machine,

but this involves an additional expense, and unless the cutting results in a very smooth bucket, it is necessary to resort to filing in \order to finish it. Since the eiiiciency vof a lturbine largely depends upon the character of the bucket surface and its shape, `fprefer to file all of the buckets Whether they are machine cut or otherwise formed.

` The scope of my invention will be more fully set forth and lclaimed hereafter.

ln the accompanying drawings Whichillustrate an embodiment of my invention, 'Figure 1 is a front elevation of a iiling machine showing the work mounted in place; Fig. 2 is a side elevation of the machine, together with its driving moans and its several parts; Fig. 3 is a rear-elevation of a wheel or inten mediate bucket section, together with its holder; Fig. 4 is a front elevation of the leholder and files; Fig. 5 is a sectional plan view showing a segment of a wheel or intermediate, together with the`ile-holder and files in section; Fig. Gis a side elevation .of a modified form of the machine for use in connection with buckets having covers cast or formed integral therewith; Fig. 7 is a sectional p'lan view showing the .mechanism for oscillating" the spring-pressed holders and files, and Fig. S is a sectional plan view of a segment ol' a Wheel or intermediate and the spring-pressed v[ile holders.

Referring now to Figs. 1 and 2, 1 illustrates a main frame on the upper end of which is 'mounted a secondary or over-hanging frame 2 carrying bea.ings 3, in which a spindle 4 is adapted to rock or oscillate about a given axis. is a tool or file-holder 5 having an enlarged head th at lits over the spindle. reduced in size at 6, and the reduced portion is eccentric to its axis and carries removable files 7, preferably three in number, two of which may be arranged on one side of the tool-holder for iiling the concave surface of the bucket, and the third on the other side of the tookholder for filing the convex surface oi an adjacent bucket. lA may file the conveX and concave surfaces separately if desired.

ln order to rock .or oscillate the tool-holder a crank 8 is employed which is located between the bearings 3 and is feathered or splined on the spindle so that the latter can be moved. up and down, to move the tools toward or away from the work. the front face of the main frame 1 and forming a. part of the work-holder is a bracket 11, which is adjustable in a vertical direction. The bracket is held in place by bolts 12, which pass through openings 13 into the frame l. Dove-tailed tothe top of the bracket 11 is a horizontal sliding late 14, and on this plate is mounted a hok er 15, to

which the work is clamped. The under side This head is l Secured to in contact with the tool.

v other.

of the holder 15 is provided with. a recess 1G, Fig. 3, and the side walls 17 of said recess assist in preventing the holder froin 'moving longitudinallyindependentol'theslidingplate 1'4. rl`he work-holder is provided with slots 18 through whichthc clamping bolts or hand screws 19 pass for securing the u ork in place. The concave or back surface 2() of each bucket is parallel with the convex or front surface of the adjacent bucket.

ln order to niovc the 'work into engagelnent with the file and hold it there, l provide a levelI 22 pivolcd on tho face ol" the bracket, as at 23, which holds the surface to be linished against the oscillating illes. rl`his lever is rounded at one end 24 which engages with the dove-tailed plate 14 for holding the work rthis also crinits both surfaces of adjacent buckets to )e filed without withdrawing the tool froin the space 'betffeen the buckets.- When the illes are broughtinto contact with the concave surface 20, they tend to inovc the work together with the'work-holder to the left.A ln sonic cases onlythe back or iluid-inipiuging surfaces are tiled, but it inay be necessary in some cases to ille both the concave and con- Vex surfaces of the bucket. t is d illicult in some cases to file. these surfaces simultaneously and, in order. to save time and to reduce the labor involved, all the surfaces of one shape may be `liled and then all of the lf the axis of the ille-holder is not exactly arallel 'with the surface of the bucket to be ii ed, it will be necessary to, feed the Work and lilo slightly with respect to each other as the filing progresses. ln any event, the work and Aille should bev kept in contact with each other under a reasonable amount of pressure. '.Ihavc found that by working the lever 25 with one 'hand and the lever 22 with the other, workinen are able to 1naintain the proper relation between the lile and the work at all stages, Ordinarily the pressure exerted upon the levers is a inore or less yielding one. This may if desired be done by' mechanical nieans or by'a combination of mechanical and inanual means. ln view of the fact that the surfaces of the buckets are radial or approximately so, and the tool vertical, two or three buckets are first filed, and thcnthework is unclainped and advanced 5 inany buckets as ,have been filed until the whecl or intermediatebucket sectionhas been completed.'

In order to keep thc work in proper alinen'icnt under the toolvl have provided a projection 43 on the front of the rest 1 l, having a lateral slot 44 for receiving a hand screw 45. This screw is for adjusting the work backand forth under the tool, or toward or faces 10 of the. buckets.

chattering, and to assist the vertical walls 17 of the work-holder7 Fig. 3, to oppose lon-- gitudinal movement.

lhe tool-holder is brought into and out of working relation to the bucket surfaces by the weighted hand-lever 25, which is pivoted to ihr freine 1. 'lhis lever has a connectin rod 2o attached thereto, which rod is secure at its upper cud to the rlever 27. The lever 27 is lnounled to turn on the upright arm 28 of the secondary frame 2. Secured to the oi'ipositc ond therccf is a link 2Q which is connected to the spindle 4,. by a ball and socket' y uioint.

A niotor 230 is mounted on the back of the gear 32. This gear is surrounded by a casing 3S, and the casing is mounted on a support 34 that is dctachably secured to the frame.

At the opposite. end of the shaft carrying the.

gear 32 is a beveled gear 35 engaging another gear which is secured to the uprightshaft 36. The gears are covered by a casing 37 secured to the support ,34. This support has tw'o journals arranged to support the vertical shaft- 36 and also the horizontal shaft carrying the bevel and spur gears 35 and 32. The shaft 36 is jcurnaled at its upper end in the bearing 38, and securedto the upper end of the shaft is a crank disk or other eccentric kdevice 39 having a connecting rod 40 for con- 42 mounted 'therein for adjusting the extentY of the rocking or oscillating of the crank 8. The crank 8 is usually slotted so that any desired adjustment can be obtained.

As shown in Fig. 4 the bottom of the les project'below the bottoni of the i1eholder. The object of this is to allow the files to clean the root of the buckets of any roughness, or to finish the surface between buckets. The back of the iilcdiolder, Fig. 5, is cut awa as at 9 to allow theiile-holder to turn in in the convex surfaces 21 of the buckets, an also to prevent its striking the straight surln other words, the back of the holder is so shaped that it will not interfere with the action of the tool. When it is desired to file buckets of different size a' tool-holder is provided for each size.

liigs. G, 7 and 8, show a inodicationof my improved machine adapted to file buckets having covers formed integral with or otherwise secured to them. Secured Vt'o the oscillating spindle 4 is a frame 50 having side rod 51, and mounted thereon are spring-pressed prevents the iiles from slipping out and also allows them to aline properly on the surface being tiled, The bucket is showigin section, Fig. 6, having a` cover 56 cast or formed thereon, and lclamping plates 57 are secured by bolts 58 to the work-holder for securing the intermediate yor{bucket-wheel section in place. A hand-screw 59 is shown for holding the Work in place under the oscillating tool, The tools. are foscillated byl the connecting rod 40 which is adjustably connected Ato the crank-disk 39 and'crank 8. By the constructionshownA in Figs. 6, 7 and 8, I am enabled to Itile ai complete rotary element of a turbine without removing it from the machine.` The :wheeler rotary element can be clamped to the work-holdcr as is the intermediate or. bucket wheel section hereinbciiore described. 4'lhebuckets are. finished in the same manneras thosepreviously described, that 1s, `one or-more oucketsare filed and `then the-clement lisfturned or advanced a corresporullng amount. his operation conthat they are springmounted and are capable of being moved a limited amount around the side rods 51.

In filing buckets the bracket .11 is adjusted to the desired height and the work clamped in place on the work-holder; the motor is then started which causes the tool-holder to rock or oscillate. It the oscillations are too great or too small, the crank-pin and block can be readjusted. The operator begins filing by depressing the lever 25 bringing the tool into contact with. the concave surface which is to be filed. The tool in striking or coming in contact with the radial surface tends to move the work laterally out of the pa'th ofthe tool whiclrtendency is opposed by the hand-lever 22, held by the operator. Three buckets are preferably filed one after the other and then the work is unclamped and carried forward as many buckets as have been filed, and this is repeated until all of the concave surfaces are finished. The convex surfaces are tiled precisely the same as the concave surfaces, with the exce tion that the pressure exerted on the handever 22 is reversed.`

In accordance with the provisions of the patent statutes, I have described the principle of operation of my invention, together with the apparatus which I now consider to represent the best embodimentthereof, but I desire to have it understood that the apparatus shown is only illustrative, and that the invention can be carried out by equivalent means.

What I claim as new and desire to secure by Letters Patent of the United States, is,

1. In a machine of the character described,

the combination of a frame, a spindle mounted in the frame, a tool carried by the spindle, an eccentric device for imparting to the spindle and tool a constant oscillatory movement about the axis of the spindle, means mounted on the frame and having a connection with the spindle for moving it axially to shift the position of the tool relative to the work, a movable Work support on the frame, and means for moving the support to exert a lateral pressure between the work and thev tool.

2. In a machine of the character described, the combination of a stationary frame, a spindle mounted on the frame, a tool carried by the spindle, means for imparting to the spindle and tool a constant oscillatory move mentabout the axis ot' the spindle including a crank connected to the spindle, a system of levers mounted on the frame and having a connection with the spindle for moving it axially to shift the position of the tool rela tively to the work, a Work-holder slidably mounted on the frame, and manually,T controlled means for moving the work holder .to bring the work and tool into lateral engagement.

3. In a machine ol the character described, the combination of a 'lilo holder, tiles mounted on its front and rear i'aces l'or filing opposed surfaces ol the work, a work-holder adjacent the files, means for moving the files into and out of engagement with the work on the holder, means for oscillating the tile holder about a given axis including an eccentric device and mechanism for actuating said. device, and manually controlled means for exerting a lateral pressure between the Work and the tiles.

4. In a machine of the character described,v the combination oi' a l'raine, an oscillatory member mounted on the frame and carrying a tool, eccentric means connected to the member for constantly oscillating the tool, a device for shii ting the tool longitudinally to change its relation to the work, a work holder movably mounted on the frame, a device acting on the holder to press the work into lateral engagement with the tool, andmeans for adjusting the Work on the holder.

5. In a machine of the character described, the combination of a frame, a s )indie rotatably mounted on the frame and carrying a tool provided with lateral cutting surfaces, a driving shaft, a crank driven by the shaft, a connection between the crank and the spin dle for oscillating the latter about its aXls, a work holder mounted on the frame adjacent the tool, and means foreXerting a lateral pressure between the work and the tool.

6. 'In a machine ol' the character described, the combination ol a frame, a work holder on the frame, means for adjustably` securing the holder in position, an oscillating and lon itudinally moving spindle mounted on t e 130 justable crank for imparting to the tool and connection between e device and the file \holder, and means ioiipxerting a lateral pres- .the frame, an oscillatory and longitudinally frame, a tool carried by the Spindle, an adsyindlc a constant oscillatory movement a out the axis of the spindle, and means for moving the spindle vand tool longitudinally while they are oscillating.

7. In a machine of the character' described, the combination of a frame, a work-holderon moving file holder mounted. on the/frame adjacent the work holder, driving means 'for 'o'sf' cillating the file holder, a dev/ice mounted on the frame for moving t ie lile holder1 longitudinally With respect to the Work, a swivel ably mounted on the crank, a connection be-f f tween the crank in and the spindle 'which permits a longitudinal movement of th spinn dle While it is constantly' oscillated fr m the crank, a Work holder on the frame, ai'id a de- 1 9. In a machine of the/character described,v

the combi/nation'of a frame, a Work holder mov/ably( mounted on the frame, a spindle r4adjacent the holder, atoolhaving lateral surfaces'vvhich is carried b the spindle, bear ings ontheframe'in whic the spindle is rotatably mounted and movable longitudinally, a crank slined to the spindle, a second crankconnecte with the rst, means for driving the second crank to oscillate the spindle about its axis in the bearinfv's, a lever for moving the spindle longitudinally through the bearings and the first mentioned crank, a swivel/connection between the levez` andone end of the spindle, and a manually controlled lever pivotally connected to the work holder for ressing the work into lateral engagement Wit i' the tool.

,In Witness whereof, I have hereunto set my hand this 2nd daypf November, 1904.

v JOHN RIDDELL. Witnesses:

BENJAMIN B. HULL, IjlQE'LEN Onronn. 

